Eugen ritter



(fie Model.) E. BITTER.

SCREW FASTENING FOR BOXES 0R GASES.

N0.'3Z1,054. I Patented June 30, 1885.

UNITED STATES v PATENT EEICE.

EUGEN' BITTER, OF EHRENFELD, GERMANY.

SCREW-FASTENING FOR BOXES OR CASES.

SPECIFICATION forming part of Letters Patent No.321,054, dated June 30, 1885.

Application filed February 28, 1885. (No model Patented in Germany February 26, 1884, No. 28,254, and in England April 8, 1884,

To all whom it may concern.-

Be it known that I EUGEN BITTER, of Ehrenfeld, Germany, have invented an Improvement in a Screw-Fastening for Boxes or Gases; and I hereby declare the following to be a full, clear, and exact description of the same.

My invention relates to an improved means for closing and securing boxes, for which Patents have been granted me in foreign countries, as follows: Germany, No. 28,254, February 26, 1884, and England, acceptance No. 5,554, April 8, 1884.

My invention consists of a screw which pisses through the cover or part to be secured, aid a cylindrical nut having interntl srreuvthreads, into which the screws fits and external threads by which it may be screwed into the edge; or body of the box, so as to form permanent sockets into which the screws may be inserted at any time, a 1d from which th y m iy be removed when it is desired to remove the cover without defacing or breaking the wood-work.

Referring to the accompanying drawings for a more complete explanation of my invention, Figure 1 is a side elevation showing a box and a cover having my invention applied to them. Fig. 2 is a plan view of the box, showing the sockets fixed in its edges. Fig. 3 is a View of a tool by which the sockets may be introduced and seated.

In the usual method of securing the covers of boxes or C2I S(S in which nails or ordinary wood screws are used, the holes soon become. broken,so that the screw-threads will no longer hold. My invention is especially useful for boxes or cases in which cartridges or other articles are to be transported, and which are intended to be used frequently and for a considerable length of time.

A is a screw by which the cover of the box or case is to be secured. It may have a conical head, a, with the usual slot, 1), for the use of the screw-driver, the point or opposite end being threaded, as shown at g.

Bis a hollow cylindrical nut, the interior of which may be screw-threaded for a part or the whole of its length,as shown, these threads being of such a pitch as to receive the threads of thescrew A.

Upon the exterior of the cylindrical nut B drical nut may be inserted by means of a p wrench,which,as is shown at E,Fi g. 3,has transverse or T-shaped handles and screws-threads at its opposite ends, which threads fit the interior of the nut, so that they may be turned into it until the shoulder at the upper end of the threads rests upon the top of the nut.

By turning the Whole device around the nut may be screwed into a hole previously made for it until the upper end is flush with the edge of the box into which it isinserted. This upper end may preferably have a beveled flange, so that it fits snugly into the hole and makes agood finish at the top.

A groove or channel may be made transversely across the exterior of one side of this cylindrical nut; or it may pass into it a short distance, so as to receive a pin, F, which may be driven in it after-the nut has been screwed down to its place. This pin will then hold it, so that itwill not come out when the screw is removed.

As many of these cylindrical nuts may be fixed in the edge of the box as may be neces siry for the pupose of securing the cover H, which has corresponding holes bored through it for the reception of the screws A.

By this construction I provide a permanent method of securing the parts of boxes or cases together, and they may be easily separated without destroying the wood-work.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

A screw having threads at one end and a w Vitnesses:

ADOLF RELLER, OTTo VENDEL. 

